Olivas-Salazar Raquel, Estrada-Angulo Alfredo, Mellado Miguel, Aguilar-Caballero Armando Jacinto, Castro-Pérez Beatriz Isabel, Gutiérrez-Blanco Eduardo, Ruiz-Zárate Fernando
Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, Mexico.
Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro N° 1923, Buenavista, CP. 25315, Saltillo, Coahuila, Mexico.
Trop Anim Health Prod. 2018 Apr;50(4):807-813. doi: 10.1007/s11250-017-1499-x. Epub 2017 Dec 26.
The objective of this study was to determine the prevalence of gastrointestinal nematode (GIN) infection in goat flocks on semi-arid rangelands of northeastern Mexico (25° N, 350-400 mm annual precipitation). The study included 668 pluriparous goats from 18 herds in five municipalities of Coahuila and Nuevo Leon, Mexico. Five genetic groups were considered (predominance of Boer, Nubian, Alpine, Saanen, and Toggenburg). Fecal samples were taken from the rectum of each animal to determine the number of eggs per gram (EPG) of GIN. The prevalence of flocks with GIN infections was 88.9%. Similar results were observed for the number of goats infected in the flocks. The Alpine breed presented the highest prevalence and highest EPG loads of GIN, whereas Boer and Nubian were the genetic groups with the lowest (P < 0.05) EPG. There was a negative effect of GIN infection on the live weight of goats (P < 0.05). The GIN genera found were Trichostrongylus spp. and Haemonchus spp. It was concluded that in the goat flocks of the semi-arid zones of Mexico was found a high prevalence of infections with gastrointestinal nematodes. The municipality and the breed of the animals were factors that showed influence on this prevalence and the level of infection of the goats.
本研究的目的是确定墨西哥东北部半干旱牧场（北纬25°，年降水量350 - 400毫米）山羊群中胃肠道线虫（GIN）感染的流行情况。该研究包括来自墨西哥科阿韦拉州和新莱昂州五个市18个畜群的668只经产山羊。考虑了五个遗传群体（波尔山羊、努比亚山羊、阿尔卑斯山羊、萨能山羊和吐根堡山羊占优势）。从每只动物的直肠采集粪便样本，以确定每克粪便中GIN的虫卵数（EPG）。GIN感染畜群的流行率为88.9%。在畜群中感染山羊的数量也观察到了类似结果。阿尔卑斯山羊品种的GIN流行率和EPG负荷最高，而波尔山羊和努比亚山羊是EPG最低的遗传群体（P < 0.05）。GIN感染对山羊的体重有负面影响（P < 0.05）。发现的GIN属为毛圆线虫属和血矛线虫属。得出的结论是，在墨西哥半干旱地区的山羊群中，胃肠道线虫感染的流行率很高。动物所在的市和品种是对这种流行率和山羊感染水平有影响的因素。
